Herein, a ZIF-8-on-MIL-68(Ga) precursor derived ZnGa2O4/ZnO heterojunction can promote charge separation and has a strong photoredox ability, while decoration with a Au cocatalyst can lower the Gibbs free energy barrier of the rate-determining step in the photocatalytic CO2 reduction reaction, leading to a high CH4 yield of 21.1 μmol g−1 h−1 in pure water without any sacrificial reagent.
Y. Ma, Q. Jiang, X. Li, H. Yu, X. Han, Y. Liu, Q. Li, K. Lv and J. Hu, Chem. Commun., 2025, 61, 6831 DOI: 10.1039/D5CC00705D
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